GPT-5.1 vs Phi 4 Mini Instruct
OpenAI vs Microsoft — benchmarks, pricing, and capabilities side by side.
- •GPT-5.1 has the higher intelligence index (89 vs 32.6)
- •Phi 4 Mini Instruct is cheaper ($0.08 vs $1.25 per 1M input)
- •GPT-5.1 has a larger context window (400K)
| GPT-5.1 | Phi 4 Mini Instruct | |
|---|---|---|
| Intelligence index | 89 | 32.6 |
| Developer | OpenAI | Microsoft |
| Type | LLM | LLM |
| Access | API only | Open weights |
| Context window | 400,000 tokens | 131,072 tokens |
| Input price | $1.25 / 1M | $0.08 / 1M |
| Output price | $10.00 / 1M | $0.35 / 1M |
| Speed | 115 tok/s | — |
| Released | November 12, 2025 | October 17, 2025 |
| Parameters | — | — |
| Input modalities | Text, Image | Text |
| Output modalities | Text | Text |
Shared benchmarks
GPT-5.1
Phi 4 Mini Instruct
AIME 2025
94
6.7
GPQA Diamond
88.1
33.1
Humanity’s Last Exam
26.5
4.2
LiveCodeBench
86.8
12.6
MMLU-Pro
87
46.5